def test_dict_merge_errors():
from xoutil.objects import dict_merge
first = {192: 192}
second = {192: [192]}
with pytest.raises(TypeError):
dict_merge(second, first)
with pytest.raises(TypeError):
dict_merge(first, second)
def test_dict_merge_simple_cases():
from xoutil.objects import dict_merge
first = {'a': {'attr1': 1}, 'b': {'attr1': 1}, 'c': 194, 'shared': 1}
second = {'a': {'attr2': 2}, 'b': {'attr2': 2}, 'd': 195, 'shared': 2}
expected = {'a': {'attr1': 1, 'attr2': 2},
'b': {'attr1': 1, 'attr2': 2},
'c': 194,
'd': 195,
'shared': 2}
assert dict_merge(first, second) == expected
assert dict_merge(first, **second) == expected
assert dict_merge(second, first) == dict(expected, shared=1)
assert dict_merge(second, **first) == dict(expected, shared=1)
def test_dict_merge_compatible_cases():
from xoutil.objects import dict_merge
first = {192: ['attr1', 1], 193: {'attr1', 1}}
second = {192: ('attr2', 2), 193: ['attr2', 2]}
assert dict_merge(first, second) == {192: ['attr1', 1, 'attr2', 2],
193: {'attr1', 1, 'attr2', 2}}
result = dict_merge(second, first)
assert result[192] == ('attr2', 2, 'attr1', 1)
key_193 = result[193]
assert key_193[:2] == ['attr2', 2]
# Since order of set's members is not defined we can't test order, we can
# only know that they'll be in the last two positions.
assert key_193.index('attr1') in (2, 3)
assert key_193.index(1) in (2, 3)
def test_dict_merge_base_cases():
from xoutil.objects import dict_merge
base = {'a': 'a', 'd': {'attr1': 2}}
assert dict_merge() == {}
assert dict_merge(base) == base
assert dict_merge(**base) == base
